Mr. Takayuki Yanagisawa Profile

Takayuki Yanagisawa

Chief Researcher

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Publications (8)

Proceedings Article | 28 October 2022 Presentation + Paper

Field-deployable prototype of the 1.53-µm coherent DIAL for simultaneous vertical profiling of water vapor density and wind speed and direction

H. Tsuji, M. Imaki, T. Yanagisawa, K. Shigyo, S. Kameyama

Proceedings Volume 12265, 1226508 (2022) https://doi.org/10.1117/12.2636104

KEYWORDS: Prototyping, Signal processing, Transceivers, Telescopes, Integrated optics, Profiling, Environmental sensing, Switching, Modulation, LIDAR

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Proceedings Article | 26 March 2015 Paper

In-phase synchronization of array laser using intra-Talbot-cavity second harmonic generation

Kenichi Hirosawa, Fumio Shohda, Takayuki Yanagisawa, Fumihiko Kannari

Proceedings Volume 9342, 934217 (2015) https://doi.org/10.1117/12.2078796

KEYWORDS: Neodymium lasers, Waveguides, Harmonic generation, Planar waveguides, Mode locking, Laser applications, Output couplers, Second-harmonic generation, Waveguide lasers, Wave propagation

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Proceedings Article | 19 November 2012 Paper

1.5-μm high average power laser amplifier using an Er,Yb:glass planar waveguide for coherent Doppler LIDAR

Takeshi Sakimura, Yojiro Watanabe, Toshiyuki Ando, Shumpei Kameyama, Kimio Asaka, Hisamichi Tanaka, Takayuki Yanagisawa, Yoshihito Hirano, Hamaki Inokuchi

Proceedings Volume 8526, 852604 (2012) https://doi.org/10.1117/12.976293

KEYWORDS: Waveguides, Doppler effect, LIDAR, Planar waveguides, Laser amplifiers, Cladding, Optical amplifiers, Glasses, Laser development, Pulsed laser operation

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Proceedings Article | 19 November 2012 Paper

Wind sensing demonstration of more than 30km measurable range with a 1.5 μm coherent Doppler lidar which has the laser amplifier using Er,Yb:glass planar waveguide

Shumpei Kameyama, Takeshi Sakimura, Yojiro Watanabe, Toshiyuki Ando, Kimio Asaka, Hisamichi Tanaka, Takayuki Yanagisawa, Yoshihito Hirano, Hamaki Inokuchi

Proceedings Volume 8526, 85260E (2012) https://doi.org/10.1117/12.977330

KEYWORDS: Optical amplifiers, Signal processing, LIDAR, Planar waveguides, Laser amplifiers, Doppler effect, Wind energy, Telescopes, Polarization, Signal detection

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Proceedings Article | 13 February 2001 Paper

1.5-um eye-safe coherent lidar system for wind velocity measurement

Kimio Asaka, Takayuki Yanagisawa, Yoshihito Hirano

Proceedings Volume 4153, (2001) https://doi.org/10.1117/12.417063

KEYWORDS: Velocity measurements, LIDAR, Wind measurement, Pulsed laser operation, Signal to noise ratio, Telescopes, Receivers, Semiconductor lasers, Atmospheric optics, Sensors

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Proceedings Article | 13 February 2001 Paper

10.9-mJ single-frequency diode-pumped Q-switched Er,Yb:glass laser for a coherent Doppler lidar

Takayuki Yanagisawa, Kimio Asaka, Yoshihito Hirano

Proceedings Volume 4153, (2001) https://doi.org/10.1117/12.417032

KEYWORDS: Pulsed laser operation, Semiconductor lasers, Q switched lasers, LIDAR, Wind energy, Laser stabilization, Doppler effect, Laser development, Q switching, Mirrors

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Proceedings Article | 31 December 1997 Paper

Influence of vibrations on Fourier transform spectrometers

Takayuki Yanagisawa, Tomohiro Akiyama, Yasuhisa Tamagawa, Yoshihito Hirano, Yoshikazu Kamiya

Proceedings Volume 3221, (1997) https://doi.org/10.1117/12.298110

KEYWORDS: Fourier transforms, Spectrometers, Computer simulations, Sensors, Atmospheric sensing, Spectral resolution, Optical components, Reflectors

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Proceedings Article | 27 June 1996 Paper

Simulation of visible/infrared sensor images

Tomohiro Akiyama, Yasuhisa Tamagawa, Takayuki Yanagisawa

Proceedings Volume 2744, (1996) https://doi.org/10.1117/12.243519

KEYWORDS: Sensors, Imaging systems, Computer simulations, Image sensors, Atmospheric sensing, Reflectivity, Atmospheric optics, Adaptive optics, Computing systems, Visible radiation

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Showing 5 of 8 publications

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